the door told that peggy woulneed an operation if i didn do someing abouit straightway. porter: peggy was about to go blind. thentragicallyher father diednd her motr couldn't afford laser eye surgery for her daughter. and so, from their small flat, peggy's mother began selling insurance policies. she'd then sew until t early hours of the morning, scraping together enough ney for a treatment at's becomvery popular inast asia -night nses. the tra thick coact lenses reshapthe patiens cornea while th sleep. but they're only effective if worn every night. and peggs mother h to keep buying newnes. tsai: it's expensive, but the eyes are the windows to the soul. and if she didn't see anything, then the world would be a very dark pla. her thoughts, too. i want her to have light thoughts. chen: i was so scared of going blind. my mother had already prepared meor it. she gome a sleepg mask, an ught me how wash and ld my socks with it on, for when everything eventually went dark. reporter: peggy was lucky. yet cases of sudden blindness as a resu of shortshtedness a beming ever re comm